Perpetual calendar



i W.,: QRTH 17. 1922 2 Sheets-Sheet. 1

PERPETUAL CALENDAR Filed Aug June 19, 923

June 19,1923.

Filed Aug, 1'7. 1922 2 Sheets-Sheet 2 Patented une 19, 1923,

Unire ,.f.

FRED 1U. ORTH, OF QCEAN PARK, WASHINGTON.' y

rnnrnrunn CALENDAR.

Application filed August 1*?, 1922. Serial` No. 552/507.

T aZZ whom t may concern i Be it hereby known that I, Fern II'. QRTH? a citizen of the United States, and a resident ot Ocean Park, in the county of Pacific and State of lashing/ton, have invented a new and use'iul Perpetual Calendar, 'of which the following is 'a specification.

This invention relates more particularly to calendars for displayingthe day of the month, month and year for any number of years within the range ofthe device.

The object of my invention is to provide an exceedingly simple and e'liicient calendar which will indicate the correct day, date, month and year for succeeding years including leap years. l

I accomplish these results in the manner set forth in the followingspecication and illustrated in the accompanying drawings, in which:

Figure 1 is a front elevation of the device with portions cut away for clearness. Figure 2 is a section along the line 2 2 in Figure 1. Figure 3 is al plan of the web which bears the upper tour tiers of dates. Figures 4, 5 and 6 are separated sections of the web which bears the lower two tiers of dates.

Similar numbers of reference reiter to the same or similar parts throughout the several views.

Referringin detail to the dra-wing'.y I have constructed my device upon a rectangular frame 10 having' horizont-al dividing partitions 11 and 12. Below the partition 11 and journaling in the sides of the trame 10 I have mounted the rollers 13 and 14 which turn on the shafts 15. Small idler rollers 16 and 17 are also mounted below the partition l1 and near the front or" the 'trame lO. The roller 17 journals in the slotted bearings 18 and is held away from the roller 16 by the springs 16 which are attached to the .trame 10. A web 19 of suitable material and having the dates 20 printed thereon is attached to the rollers 13 and 14 and passes around the rollers 16 and 17. The shafts 15 are provided with the sprockets 21. One shaft 15 extends beyond its sprocket and is provided with a setting knob 22, A chain 23 passes over the sprockets 21 and rrotates the rolls 13 and 14 in the same direction.

Between the members'11 and 12 and journaling in same. I have placed the two vertical rollers 24 and 25 which carry the sprockets 26 around4 which` passes the lchain The bevel gears 28 are attachedfto a sprocket 26 and to the'shatt 29 which jour-v nals in the bearing 30. A knob 31 is used to rotate 'the rollers 24 and 25. l rfothese rollers is attached theA web 32. which carries `the upper tour tiers of dates. i Idler rollers are also provided to hold the web 32 close to the front of the frame 10. I Above the member 12 and journaling the sides of the frame 10, are the rollersj 34 and 35; The rollers 34 are connectedby the sprockets 36 and the chains 37 and are driven by means of the knob 38. rIwo webs 39 are attached to the rollers 34 and pass aroundthe idler rollers 40 and have printed on same a succession ot years. Between the webs 39 and secured to the rolls. 35 I have placed the web 41 which bears the months of the year. Sprockets 42 and chains 43 connect the rolls 35 and motion is supplied to them by the knob 44. l

A case 45, large enough to receive the frame 10 is provided and the knobs 3l, 38 and 44 project thro-ugh its side. Openings 46 reveal the year7 while openings 47 show the months. Openings 48 show the upper four rows of dates and 49 the lower two rows of dates. The letters show the days of the week and are fixed and may be on the front of the case or may be inthe form of transparencies as is the case with the other characters in case the device is to be illuminated from behind.

The operation of my device is as follows: Turn knob 38 until the correct year appears in the window 46. Then turn the knob 44 to display the proper month in the window 47. Then turn knob' 31 until the first date is under the correct dav .of the week. Then turn knob 22 until the dates in the windows 49 correspond with those above` It will be seen that by this arrangement of parts I have produced a calendar whose range is only limited b v the. number ot years which are listed on the'web 39. By the arrangement of webbing above described it vvest is possible to properly position the first day .v

ot any month under its proper day of the week with the minimum amount oit webbing' owing to the great reduction in the number of combinations required. i

I am aware that many forms of calendars have been constructed in the past, and therefore intend to cover only those forms and modifications that fall fairly within the appended claims.

Vhat I claim asfnew is:

l. A calendar having in combination a moveable web bearing year dates, a second moveable web bearing month names,-a third web adapted to be moved horizontally and bearing the four upper tiers of dates in eX tended lines, a fourth web vertically moveable and of uniform width bearing the dates which would fall in the lower two tiers of dates in all of the possible combinations, a :stationary row of characters representing the frame having openings in its front with a moveable web carryingon its face a succession of year numbers arranged to be visible third web moveably mountedbehind saidwindows bearing the upper four tiers of dates, the first row beginning with l att-he l' middle and running to seven on the right,

the second row runs from 2 onthe left to 14. on the right, the third row runs i`roin-9 lon the left to 2l on the right,` the fourth runs y 'from 16 on the left to 28 on theright,.and a 'vertically moveable web below said third web bearing in vertical column those combinations of dates which may occupy the fifth and sixth lines of the .calendar and means `for adjusting `the relation of said moveable webs.

FRED 7., ORTH. 

